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参数资料
| 型号： | M54HC692 |
| 厂商： | 意法半导体 |
| 元件分类： | 通用总线功能 |
| 英文描述： | Decade Up/Down Counter/Register(十进制j加/减计数器/寄存器) |
| 中文描述： | 十年加/减计数器/寄存器（十进制?加/减计数器/寄存器） |
| 文件页数： | 3/23页 |
| 文件大小： | 433K |
| 代理商： | M54HC692 |
TRUTH TABLE
INPUTS
CCK
OUTPUS
QB
Z
L
b
NO CHANGE
NO CHANGE
COUNT UP
NO CHANGE
L
b’
NO CHANGE
FUNCTION
CCLR LOAD
X
L
H
H
H
H
H
X
X
X
(*): X forHC690/691
X : DON’T CARE
Z :HIGH IMPEDANCE
a-d : THE LEVEL OFSTEADY STATEINPUTS AT INPUTS ATHROUGHTD RESPECTIVELY.
a’-d’ : THELEVELOF STEADYSTATE OUTPUTSAT INTERNALCOUNTEROUTPUTS a’ through qd’ respectively
HC690/692 RCO = QA
QD
ENT
HC691/693 RCO = QA
QB
QC
QD
ENT
ENP
X
X
X
L
X
H
X
X
X
X
ENT
X
X
X
X
L
H
X
X
X
X
forHC692/693
RCLR
X
X
X
X
X
X
X
L
H
H
RCK
X
X
X
X
X
X
X
(*)
R/C
X
L
L
L
L
L
L
H
H
H
G
X
L
L
L
L
L
L
L
L
L
QA
Z
L
a
QC
Z
L
c
QD
Z
L
d
X
X
L
H
H
H
X
X
X
X
X
(*)
HIGH IMPEDANCE
CLEAR COUNTER
LOAD COUNTER
NO COUNT
NO COUNT
COUNT UP
NO COUNT
CLEAR REGISTER
LOAD REGISTER
NO LOAD
X
X
X
L
a’
L
c’
L
d’
BLOCK DIAGRAM
M54/M74HC690/691/692/693
3/23
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